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PCM Replacement?

Tiny
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Okay, I finally found it. The GEM or body control module is part of the VSM. I found the part number on Alldata and it turned out to be the VSM. Go figure that one out. Thank you engineers.

Roy
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Friday, April 10th, 2020 AT 4:12 PM
Tiny
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Haha! So next question. Does the part number on the VSM have to match the replacement? Struggling to find one. 2c7t-15k602-aj
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Friday, April 10th, 2020 AT 4:15 PM
Tiny
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Yes, exactly if that is the issue. It must also be programmed to your VIN number as well.

Roy
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Friday, April 10th, 2020 AT 4:43 PM
Tiny
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Struggling mighty to find one online. I read 4c7t-15k602-aj can replace mine?
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Friday, April 10th, 2020 AT 4:46 PM
Tiny
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Nope, need to be exact.

I will check as well.

Roy
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Friday, April 10th, 2020 AT 5:21 PM
Tiny
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I may need to go check a junkyard. Sometime in the near future with everything going in right now.
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Friday, April 10th, 2020 AT 5:24 PM
Tiny
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I understand completely.

Roy
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Friday, April 10th, 2020 AT 5:29 PM
Tiny
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I’ll pursue looking. Please let me know if you find anything. I can’t tell you how much I appreciate your help.
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Friday, April 10th, 2020 AT 5:31 PM
Tiny
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I was just going to a site www. Car-part. Com. Good site for used parts. Enter your information and your zip code and they will list all the yards that have one, price, phone numbers and emails.

Roy
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Friday, April 10th, 2020 AT 5:34 PM
Tiny
JACOBANDNICKOLAS
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Hey guys. I was reading back through this and wondered if you could check something simple for me. Under the left hand side of the dash is the central junction box (CJB). When you mentioned GEM, it brought back a memory. Check to see if there is any evidence of water leaking in on the CJB. It can cause all kinds of issues.

Joe
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Friday, April 10th, 2020 AT 10:11 PM
Tiny
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Fuse box doesn’t appear to have water damage.
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Saturday, April 11th, 2020 AT 8:51 AM
Tiny
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Joe is right about the fuse block.

You may not be able to see any damage as it may be internal.

Roy
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Saturday, April 11th, 2020 AT 9:32 AM
Tiny
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I’m not sure if I mentioned it but wiggling wires in the fuse block seems to kill the truck. At least while it’s unbolted. Then have to re position to start it. Fairly confident it’s wires right in the middle and not sure if that has anything to do with the power train EEC relay clicking constantly. The click stops when the brake is pressed.
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Saturday, April 11th, 2020 AT 9:36 AM
Tiny
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While what is unbolted? The fuse block?

What about when it is running and connected? Did you wiggle the wires and see if it dies?

Roy
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Saturday, April 11th, 2020 AT 9:40 AM
Tiny
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Yes I have it unbolted currently. Will boot it back on and wiggle wires.
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Saturday, April 11th, 2020 AT 9:42 AM
Tiny
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Keep us updated.

Roy
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Saturday, April 11th, 2020 AT 9:53 AM
Tiny
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Okay, I couldn’t seem to get it to die while bolted up. Definitely dies when hanging while moving wires. It seemed like I couldn’t get it to die with that harness unplugged but again, rain stopped me short. It just started raining and it’s not in my garage so I came in. But, I’ve found the culprit harness of the buzzing. The red circled one. The taillights turn off when unplugged and the buzzing relay stops. When plugged in, it starts right away. There’s also a quick beep somewhere behind my dash every time it’s plugged in? I hear the same beep sometimes when starting the truck.
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Saturday, April 11th, 2020 AT 10:17 AM
Tiny
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Okay.
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Saturday, April 11th, 2020 AT 10:22 AM
Tiny
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Any idea what that harness runs to on the other end?
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Saturday, April 11th, 2020 AT 10:24 AM
Tiny
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No, we do not have a routing diagram for the harness. You will have to follow that one.

Roy
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Saturday, April 11th, 2020 AT 10:31 AM

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